Lexmark C780 Using Manual

Using recycled paper

As an environmentally conscious company, Lexmark supports the use of recycled office paper produced specifically

for use in laser (electrophotographic) printers. In 1998, Lexmark presented to the US government a study

demonstrating that recycled paper produced by major mills in the US fed as well as non-recycled paper. However,

no blanket statement can be made that all recycled paper will feed well.

Lexmark consistently tests its printers with recycled paper (20–100% post-consumer waste) and a variety of test

paper from around the world, using chamber tests for different temperature and humidity conditions. Lexmark has

found no reason to discourage the use of today's recycled office papers, but generally the following property

guidelines apply to recycled paper.

• Low moisture content (4–5%)

• Suitable smoothness (100–200 Sheffield units)

• Suitable sheet-to-sheet coefficient of friction (0.4–0.6)

• Sufficient bending resistance in the direction of feed

Recycled paper, paper of lower weight (<60 gm

/16 lb bond) and/or lower caliper (<3.8 mils/0.1 mm), and paper that

is cut grain-short for portrait (or short-edge) fed printers may have lower bending resistance than is required for

reliable paper feeding. Before using these types of paper for laser (electrophotographic) printing, consult your paper

supplier. Remember that these are general guidelines only and that paper meeting these guidelines may still cause

paper feeding problems.

Unacceptable paper

The following paper types are not recommended for use with the printer:

• Chemically treated papers used to make copies without carbon paper, also known as carbonless papers,

carbonless copy paper (CCP), or no carbon required (NCR) paper

• Preprinted papers with chemicals that may contaminate the printer

• Preprinted papers that can be affected by the temperature in the printer fuser

• Preprinted papers that require a registration (the precise print location on the page) greater than ±2.3 mm

(±0.9 in.), such as optical character recognition (OCR) forms

In some cases, registration can be adjusted with a software application to successfully print on these forms.

• Coated papers (erasable bond), synthetic papers, thermal papers

• Rough-edged, rough or heavily textured surface papers, or curled papers

• Recycled papers that fail EN12281:2002 (European)

• Paper weighing less than 60 g/m

(16 lb)

• Multiple-part forms or documents